Pull on the black pull tab at a shallow angle with steady force. When the adhesive grows long, roll it around some tweezer tips and continue pulling.
If the adhesive strips break, use an opening pick to help pry up and loosen the battery.
You can also fill a plastic dropper or syringe with high concentration isopropyl alcohol and apply a few drops of alcohol under the left edge of the battery. Give the alcohol a minute to weaken the battery adhesive.
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